TDSO - Teacher Development Support Organisation

What TDSO - Teacher Development Support Organisation does

TDSO is a Cambodian non-governmental organisation (registration number 10968) founded in 2012 and headquartered in Siem Reap, specialising in in-service teacher professional development for Cambodia's public education system. The organisation trains practising teachers using two interlocking methodologies: Communicative Language Teaching (CLT), a research-backed language teaching approach, and Transferable Pedagogical Approaches (TPA), a TDSO-trademarked framework formalising student-centred, practice-based pedagogical principles applicable across all subjects. TDSO serves practising teachers already working in classrooms, addressing immediate realities of limited resources, large classes, and diverse student needs through programmes including the six-month EPPS foundation programme, Continuing Professional Development workshops, and Professional Learning Communities, alongside specialist programmes like SEED (CLIL-based STEM) and ITTSR (early-career teacher training).

The organisation's technology stack comprises a Moodle-based online learning platform supporting flipped classroom delivery, an EduBox web-based document library of Creative Commons-licensed training materials, and CiviCRM for participant data management. A Centre of Expertise in Siem Reap combines programme delivery, R&D, and a Practice School serving 500 students that functions as a demonstration laboratory. The core distribution strategy is a three-year handover model transferring capacity to 18 MoEYS Teacher Education Institutions across Cambodia, enabling planned scaling from 2,000 to 10,000+ teachers trained annually.

TDSO operates as a donor-funded NGO rather than a commercial enterprise, with no publicly disclosed revenue. It works within MoEYS government structures for programme delivery and accreditation, reaching teachers through Provincial and District Offices of Education rather than direct recruitment. International technical assistance is being extended to Laos. Operational reach includes 280+ schools and 45,000 students in Siem Reap Province, with reported 98% programme completion and 95% attendance rates, and statistically significant student learning improvements (Cohen's d of 0.93 for speaking, 0.67 for written skills).

Name

TDSO - Teacher Development Support Organisation

Legal name

Teacher Development Support Organisation

Website

https://tdso.ngo

Company type

Private

Founded year

2012

Operating status

Operating

Headcount range

11–50 employees

Short description

Cambodian non-profit NGO providing in-service teacher professional development through CLT and TPA methodologies, training 2,000+ teachers annually via partnerships with MoEYS and 18 Teacher Education Institutions, with international technical assistance in Laos.

Ownership category

akta.pro rank

Product category

Teacher Professional Development Services

NAICS

Educational Support Services (61171), Educational Support Services (611710)

SIC

Services-Educational Services (8200)

akta.pro primary industry

Learning Strategy, Instructional Design & Content Development (BPACANAG)

akta.pro secondary industries

Teacher Training & Professional Development for Adult ESL (TESOL/TEFL/CELTA for Adult Ed) (EDAAACAM), Education Systems & Skills Technical Assistance (BPADAEAI), Instructional Delivery & Pedagogy (School-Led) (EDAJAFAB), Universal Design for Learning (UDL) & Inclusive Classroom Support Platforms (EDAFAKAI)

Keywords

• Teacher professional development
• In-service teacher training
• Education capacity building
• Pedagogical methodology training
• Teacher educator development

Headquarters

HQ city

Siem Reap

HQ country

Cambodia

HQ region

Asia

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. NGO/Donor Funding: TDSO operates as a registered NGO in Cambodia (registration number 10968) funded primarily through international development funding partnerships and donor organisations supporting education sector development.

Go-to-market motion3 records

Distribution channels4 records

Marketing channels5 records

Core offering

TDSO delivers in-service teacher professional development in Cambodia using the Communicative Language Teaching (CLT) methodology and its trademarked Transferable Pedagogical Approaches (TPA) framework. The organisation trains over 2,000 practising teachers annually through structured programmes (EPPS, CPD, PLCs, SEED, ITTSR) combined with classroom coaching, while simultaneously building independent training capacity within 18 MoEYS Teacher Education Institutions through a three-year systematic handover model that scales national reach from 2,000 to 10,000+ teachers.

Product overview

TDSO operates as a multi-module teacher professional development ecosystem centred on Cambodia's education system. The portfolio comprises three interconnected programme areas: Teacher Development (EPPS foundation training, CPD, PLCs, Pre-Base Training), Teacher Educator Development (Coach Development, Peer Facilitator Training, Master Trainer Development, TEI Support), and Supporting Programmes (Practice School, Model School Support, Expert Services, SEED, ITTSR). Core methodological foundations are CLT (Communicative Language Teaching) and TPA (Transferable Pedagogical Approaches). Digital delivery infrastructure includes the Moodle Online Learning Platform and EduBox Digital Resource Library. A three-year handover model enables systematic capacity transfer to 18 national Teacher Education Institutions, scaling reach from 2,000 to 10,000+ teachers annually. The recently launched EdTech and AI pilot programme explores technology-enhanced teacher development.

Differentiator

Problem solved

Functional benefit

Products and services

• EPPS (English for Public Primary Schools) A flagship 6-month intensive English teacher training programme comprising 20 workshops combined with ongoing classroom coaching, teaching Communicative Language Teaching (CLT) methodology and Transferable Pedagogical Approaches (TPA). Targeted at primary school English teachers across Cambodia.
• CPD (Continuous Professional Development) Advanced workshops, seminars, and subject-specific training that deepen pedagogical expertise and support teachers in applying TPA approaches across their full teaching practice. For practising teachers seeking to extend their capabilities.
• PLCs (Professional Learning Communities) Ongoing peer-learning networks where teachers collaboratively refine practice, share experiences, and support each other's professional growth through regular peer-led meetings, lesson study, and action research.
• Pre-Base Training (EFT and IT for Teachers) Foundational preparation programmes covering English language competency (EFT) and digital skills (IT for Teachers), delivered through blended learning and recognised within the MoEYS national professional development framework.
• Teacher Educator Development A comprehensive system for building national teacher training capacity, including structured handover support for Teacher Education Institutions, the Coach Development Programme, Peer Facilitator Training, and Master Trainer Development.
• Coach Development Programme Training programme developing education professionals as expert classroom coaches using TDSO's systematic methodology for observation, constructive feedback, and implementation support.
• Peer Facilitator Training Programme developing experienced teachers to facilitate workshops, coordinate communities of practice, and lead school-based professional learning networks.
• SEED (STEM Education Enhancement and Development) Secondary school teacher programme using CLIL (Content and Language Integrated Learning) methodology to strengthen STEM teaching with constructivist, experiential approaches delivered in English.
• ITTSR (Interactive Teacher Training Siem Reap) One-semester (20-week) training programme for early-career teachers in NGO and community schools covering essential pedagogical skills including lesson planning, classroom management, questioning techniques, activity design, error correction, and assessment.
• Practice School Demonstration facility in Siem Reap with 500 students learning English daily across demonstration classrooms, serving as a development laboratory for testing approaches, a demonstration site for stakeholders, and a resource for trainee observation and coach practice.
• Model School Support Support programme helping schools meet MoEYS Model School pedagogical standards (particularly Teaching and Learning and Accountability standards) through systematic CLT/TPA implementation, intensive coaching, and sustained professional development.
• Expert Services Specialist technical services including curriculum development, assessment design, applied research and evaluation, policy advisory, and customised training of trainers for education institutions and government bodies.
• International Technical Assistance Technical assistance service adapting the CLT-to-TPA framework for international education organisations and governments, including methodology transfer, programme design, capacity building, and quality assurance support. Currently supports teacher training programme development in Laos.
• Three-Year Handover Model Systematic capacity-building process for Teacher Education Institutions: Year 1 TDSO delivers while TEI staff observe, Year 2 co-delivery with shared responsibility, Year 3 TEI staff deliver independently with TDSO coaching. Enables national scale from 2,000 to 10,000+ teachers annually.
• Moodle Online Learning Platform Web-based learning management system hosting all programme content, enabling a flipped classroom approach where teachers access preparatory materials, complete quizzes and assignments, submit work for feedback, and track professional development progress across synchronous and asynchronous learning.
• EduBox Digital Resource Library Web-based document library providing centralised access to training materials, programme resources, lesson plans, teaching activities, assessment tools, and professional development content, accessible to all programme graduates and licensed under Creative Commons BY-NC-SA 4.0.
• EdTech and AI for Teachers A six-month pilot programme with 73 teachers across three training centres in Siem Reap Province, exploring how technology and AI can support classroom practice. Teachers test digital AI tools, explore AI prompts, share ideas, and discover applications for their classrooms.

Quantifiable outcome

• 98% programme completion rate across all programmes
• +7 more outcomes

Named customers6 records

Segments5 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

AI capability2 records

Feature5 records

Partnerships

Four partnerships are on record, tiered core and minor.

• Ministry of Education, Youth and Sport (MoEYS) CambodiacoreStrategic or Co-development PartnerTDSO works in close collaboration with MoEYS, integrating approaches into national in-service teacher training structures. Programmes are officially accredited by MoEYS. Partnership ensures alignment with national education priorities and creates lasting systemic change embedded in government systems rather than parallel NGO structures.
• 18 Teacher Education Institutions (TEIs)coreStrategic or Co-development PartnerTDSO maintains partnerships with 18 Provincial English Teacher Centres and Regional Teacher Training Colleges across Cambodia. Three-year handover model: Year 1 (TDSO delivers with TEI staff observing), Year 2 (co-delivery), Year 3 (TEI delivers independently with TDSO coaching). Network serves all 25 provinces.
• Siem Reap Provincial Teacher Training College (PTTCSR)coreStrategic or Co-development PartnerPartnership delivering English Teaching Methodology component of pre-service teacher education programme. 119 student trainees graduated in July 2026 through this collaboration, receiving practical student-centred teaching approaches before beginning professional careers.
• Laos Education PartnersminorStrategic or Co-development PartnerTDSO provides technical assistance supporting teacher training programme development in Laos. Local education partners are adapting TDSO's CLT and TPA methodology for Lao educational contexts. International work validates methodology transferability across countries.

Scale indicators12 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• VVOB: Education for Development: Belgian NGO specialized in teacher professional development and coaching in low-resource country education systems. Closely comparable to TDSO in methodology-driven, government-embedded teacher PD, though VVOB operates across more African and Asian geographies rather than Cambodia-specific.
• Education Development Trust: UK-headquartered education consultancy implementing school improvement and teacher development programmes in low- and middle-income countries. Comparable in delivering evidence-based teacher PD within government education systems.
• British Council: UK-based organization delivering English teacher training and capacity building globally, including in Cambodia and Laos. Directly comparable as a CLT-adjacent, government-partnered English teacher PD provider with international technical assistance offerings.

Others

• UNESCO Asia and Pacific Regional Bureau for Education: UN agency setting education standards, building teacher capacity, and supporting education policy reform across Asia-Pacific. Tangentially comparable as a methodology/standards-setter in teacher education but operates as an intergovernmental body rather than implementing NGO.

Broad incumbents

• RTI International: Large US-based research institute implementing donor-funded education programmes globally, including teacher training and system strengthening. Operates at a much larger scale and broader portfolio than TDSO but competes for similar donor contracts in Southeast Asia.
• FHI 360: US-based international development organization running large-scale education, literacy, and teacher capacity-building programmes globally. Comparable as a donor-funded education implementer working through government structures, though at much greater scale and broader thematic scope.
• Save the Children: Major international NGO operating education programmes across developing countries, including teacher professional development and school improvement. Operates at significantly larger scale than TDSO but overlaps in in-service teacher training and government partnership models.
• UNICEF East Asia and Pacific Regional Office: UN agency implementing education programmes including teacher development and quality improvement across Southeast Asia, including Cambodia. Comparable in government-embedded education programming but operates at vastly larger scale with broader mandate.

Emerging players

• Room to Read: International NGO focused on literacy and girls' education across Asia and Africa. Tangentially comparable as a teacher-focused education NGO operating in Cambodia and other SE Asian countries, though more literacy-curriculum-focused than pedagogical methodology-focused.

Regional players

• VSO (Voluntary Service Overseas): UK-based international development organization placing education volunteers and delivering teacher training in low-income countries, including SE Asia. Comparable in volunteer-driven teacher capacity building but primarily active in Africa rather than Cambodia specifically.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/tdso-ngo

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

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M&A

Investments

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