Resource: Loyola Press has a useful page of traditional Catholic prayers (in English and in Latin). 

Kindergarten 

• Sign of the Cross 
• Grace Before Meals 
  
• Glory Be to the Father 
  

Grade 1 

• Hail Mary 
  
• Our Father 
  

Grade 2 

• Guardian Angel 
  
• Act of Contrition (traditional version) 

Grade 3 

• Apostles Creed 
  
• Prayer to the Holy Spirit 

Grade 4 

• Hail Holy Queen 
  

Grade 5 

• Memorare 
  

Grade 6-8 

• Act of Contrition (traditional version) 
  
• Prayer to St. Michael the Archangel 
  
• Eternal Rest