Concept:
ASER is one of India's largest nationwide household-based education surveys. It evaluates the learning levels of children, especially in rural India, by assessing their basic reading and arithmetic skills.
• Conducted annually by the NGO Pratham.
• Covers children generally in the age group of 3--16 years.
• Provides data on school enrolment and learning outcomes.
Step 1: Expand the abbreviation ASER.
ASER stands for:
\[
\boxed{\text{Annual Status of Education Report}}
\]
It measures the actual learning status of school-going children.
Step 2: Understand the purpose of ASER.
The survey helps to:
• Assess children's reading and mathematical abilities.
• Measure school enrolment and attendance.
• Provide evidence for improving educational policies.
Step 3: Compare the options.
• Annual Survey of Education Report -- Incorrect expansion.
• Annual Status of Education Report -- Correct.
• Achievement of School Education Research -- Incorrect.
• Achievement Survey of Education Report -- Incorrect.
Step 4: Final conclusion.
Therefore, ASER expands to:
\[
\boxed{\text{Annual Status of Education Report}}
\]