R. W. Keller

• Chemistry Connects to Language (Real Science -4- Kids) (Real Science-4-Kids)
• Chemistry Level I Teacher's Manual (Real Science-4-Kids)
• Physics I Connects to Language (Real Science -4- Kids)
• Real Science -4- Kids, Biology I Connects to Language
• Real Science -4- Kids, Biology Level 1 Teacher's Manual
• Real Science -4- Kids, Physics Level I Teacher's Manual
• Real Science-4-Kids Chemistry I Laboratory Worksheets
• Real Science-4-Kids Chemistry Level 2 Laboratory Worksheets (Real Science-4-Kids)
• Real Science-4-Kids Chemistry Level 2 Teacher's Manual (Real Science-4-Kids)
• Real Science-4-Kids Chemistry Pre-Level I Student Workbook (Real Science-4-Kids)
• Real Science-4-Kids Chemistry Pre-Level I Teacher's Manual (Real Science-4-Kids)
• Real Science-4-Kids Physics I Laboratory Worksheets