15.1 Dialogue

15.2 Vocabulary: higher numbers

15.5 Pattern practice

15.6 Substitution drill.

15.7 Substitution drill.

15.8 Substitution drill.

15.9 Vocabulary: months.

15.13 Pattern practice.

15.14 Counting money.

15.14e

15.15 Pattern practice.

15.17 Counting containers.

15.18 Counting conveyances.

15.19 Pattern practice.

15.20 Pattern practice.

15.21 Counting circular objects

15.22 Iteration numbers

15.24 Reading lesson