iRobot: 2nd grade lessons

Q: According to the pacing guide for Ozobot Evo, lesson 8 in the series is for grade 3 and above. Does that mean that the 2nd graders only need to learn through lesson 8 and that lesson 9 and above are for 3rd grade? Or do the students need to practice all lessons up to lesson 15? Please advise. 

A: 2nd graders should learn lessons 1-15 but not lesson 8.