Such problems may involve judgment, a combination of judgment and manipulative skills, or a combination of judgment and creative thinking with some manipulation. They may be used to discover a law or principle, to verify a conclusion, or to test the judgment and creative ability of the pupils. The term as it is used here is restricted to the type of problem which involves judgment in selection, creative planning, and careful manipulation of materials for successful completion. Such problems are frequently known as craft problems. Since this type of problem involves so many kinds of ability it is evident that it can not be introduced too early in the course if it is to be executed successfully by the pupils. To the degree that judgment ability in selection has been developed and there has been opportunity to do creative thinking, the pupils will be able to carry out such problems more independently. This does not mean that all laboratory problems are to be reserved until the end of the course, but it suggests that each problem be considered carefully to determine if the pupils' preceding training has been adequate. For example, posters may be undertaken much earlier than a problem in tie dyeing. The main requirement for successful posters is an ability to use the principles of proportion and emphasis. A problem in tie dyeing to be successful should be preceded by an understanding of the use of the principles of proportion, balance, and harmony as well as of color. The successful laboratory or craft problem provides a measure of the pupil's judgment and creative ability; an opportunity for manipulative expression; and a means of producing something that should contribute to the beauty of the home. The pupil should visualize each finished article in its place in relation to the whole scheme of the room or home. The making of articles for which there is no definite need or place in the girl's home can hardly be justified in school time. The use of those materials in laboratory problems with which the pupils will need to work later is considered the more valuable experience. For example, experience in working with dyes rather than with water colors or paints will be more useful to the average girl, for in her home she is more often confronted with the problem of renewing color in underwear or other garments or changing the color of curtains to fit in with the new color scheme of her room than with problems necessitating the use of water color or paints. Laboratory problems that are well selected and wisely directed will result in one or more of three values: 1. Pupils may have a better appreciation of fitness and purpose. 2. Pupils may have a greater desire to own and use beautiful things. 3. Pupils may have a greater appreciation for possibilities of beauty in the simple things. With these possible values in mind the teacher will need to determine which of the many laboratory problems can be used most effectively.