The work in Gaeilge is taken from your Am Don Léamh book. Try your best completing the work.
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3rd Class - Am Don Léamh 3
You have already read p28+ p30
If you can try and answer the questions on p29 and p31.
4th Class
Am Don Léamh 4
Read p32 and answer the questions on p33
Also, you can look up 'Duolingo' online.